Diaphragm for mechanical horns



Oct 13, v

4 m H 7 v m ,7 m r 6, J; M W Wy M W221i 1172112 McBarmm W. H. M BARRQN DIQPHRAGM FOR MECHANICAL HORNS Filed May 5, 1922 winners H. meanness,

0E ORANGE,

NEW JERSEY, ESSIG'NOR Tl) KLAXQN GOMPA'EY,

A. CDEEORATION OF DELAWARE.

DZA'E'HRAGM FOR MECHANICAL HORNE.

Application filed Kay 3,

To all whom it may concern.-

Be it known that l, ,VVILLXAM non, a citizen of the United States, a .lent of Orange,in State of New Jersey, have invented new and useful Improvements i phragnis for Mechanical Horns, following is a specification.

H. MoBAnn'd resithe county of Essex and certain 11 Diaof which the My present invention is particularly designed'for use in connection with horns of the type in which there is a rotary cam mounted directly on the armature shaft of an electric motor, the projections or teeth on the rain being arranged to contact wear piece on a steel diaphragm of thinness and elasticity.

with a. suitable While 'rapable of use in connection with other horns, it was primarily devised for use the wherein the armature perpendicular with the diaphragm shaft is at the center thereof, for instance in Fig. 2 of Hutclnson Patent No. 1,145,839, and also in the application of Serial No. ens, filed May 3, 1922.

Having Duncan A. McConnel,

the armature shaft concentric with the diaphragm naturally locates the teeth of tlhe cam at a distance from 'ihragrn, yet for the diavarious reasons it is desirable to have the wear piece riveted at the center of the diaphragm. As it is not desirable to' limit the diameter of the cam nor clamping elements the wear piece to the 2 of: the above menit has been proposed to use of suitarea and to provide it with a contact element located on a lateral PlOlECiLOH which overhangs the diaphragm. push has cause applied on the overhanging niece which acts as a lever. While ln such an arrangement, the cam a noticeable tilting resultant becontact this action tends to "fatigue the metal and crack the dia 'ihragin,

l have discovered tlbat for diaphragzms which sutiicicntly flexible, and.

with the structure herein described, the overhung" construction can be made enough to compare very phragms ot' the type durable favorably with diain which the cam thrusts are delivered directly downward on the center of the wear piece. vCihe construction whereby suits may be accomplished may the above re be more fully understood from the tollowing description thin, fine quality, spring clamping member "the shank t by an amount 1922. SeriaLNo. 558,150.

in connection with accompanying drawings, in which Fig. 1 is a face view or the diaphragm and wear piece embodying my invention.

Fig. 2 is a section on the line 9W2, Fig. l.

Fig. 3 is a section on the line 3-3, Fig. 1, showing the wear piece in elevation.

In these drawings, the diaphragm 1 is of steel, usually not less than four inches .in diameter, and preterably between five and sit; inches in dianr eter, by say .02 to .025 inch in thickness although it will be understood that certain features oi the lnvention are of importance, independently of the dimensions.

The cam engaging member is preferably a drop forging which has been case hardened. As shown in the drawings, it comprises the 2 which is circular, the integral-shank 4 which is preferably square, and the contact member 3 which is an cecentric projection formed so as to have an inclined contact surface 8 leading up to a ridge 3, which extends substantially radial to the axis of the clamping member 2. This brings the said ridge opposite and parallel. to the radially disposed tips of the cam projections on the rotary cam (not shown). Besides being eccentric-this projection is thrust out of the plane of the clamping nieinher 2 to produce the desired overhang wit respect to the diaphragm. Preferably a strengthening rib 3 's rear edge of the pidijection in the drop forging operation. I

The integral shank 4 is square and is riveted through a square aperture 6 in th center of the diaphragm 1, through a cushion Washer 7 which is preferably made of the same spring; steel as the diaphragm an through a front washer 8 which is heavy termed on the free i enough to maintain its shape and firmly clamp the diaphragm when the shank 4 is riveted therethrough as shown at 9. When made by forging or casting: or other plastic method, the formation ot :1 fillet 5 at the base of the shank 4t is practically unavoidable. Atthe same time it is highly desirable the the square shank 4 it the squared hole 6 with great accuracy. Hence I prefer to employ the above-described spring steel washer 7 and to make its internal diameter larger than equal to or slight- 1y greater then the base diameter of said 

